The Puzzle MADNESS!!!

1234567
Across
  1. 5. The total number of people in a city or country
  2. 6. The state of The atmosphere with respect to wind
  3. 7. The activity or practice of touring
Down
  1. 1. One occurring suddenly effecting loss of life
  2. 2. An unavoidedable danger or risk
  3. 3. An organized group of people accociated together
  4. 4. Study of our planet earth or another